Patent ductus arteriosus (PDA) is an unclosed hole in the heart's aorta.
Before birth, the fetus gets its oxygen from the mother, so the lungs are not used. The ductus arteriosus is a small hole that lets the blood of the fetus bypass lungs. In most babies, the hole closes within a few hours of birth. This is normal. When the hole stays open, blood travels in the wrong direction. This causes too much blood to flow through the lungs.
Congenital patent ductus arteriosus (PDA). Cincinnati Children's website. Available at: http://www.cincinnatichildrens.org/health/p/pda. Accessed March 5, 2021.
Mezu-Ndubuisi OJ, Agarwal G, et al. Patent ductus arteriosus in premature neonates. Drugs. 2012 May 7;72(7):907-916.
Patent ductus arteriosus. Kids Health—Nemours Foundation website. Available at: http://kidshealth.org/parent/medical/heart/patent_ductus_arteriosus.html. Accessed March 5, 2021.
Patent ductus arteriosus (PDA). American Heart Association website. Available at: http://www.heart.org/HEARTORG/Conditions/CongenitalHeartDefects/AboutCongenitalHeartDefects/Patent-Ductus-Arteriosus-PDA_UCM_307032_Article.jsp. Accessed March 5, 2021.
Patent ductus arteriosus (PDA). EBSCO DynaMed website. Available at: https://www.dynamed.com/condition/patent-ductus-arteriosus-pda. Accessed March 5, 2021.
Last reviewed December 2020 by
EBSCO Medical Review Board
Kari Kassir, MD
Last Updated: 3/5/2021
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